Replaced fuel pump on my 99 s10 automatice 6cyl by removeing bed. Had power prior to removal now no power to the grey wire at pump. any ideas?
can't find fuel filter truck won't start acts like fuel problem .
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Open the hood and support it with the hood prop rod. Unhook the negative battery cable from the terminal with the battery wrench. Position the cable end away from the battery so that it cannot accidentally contact the battery during the rest if this procedure.
Disconnect the fuel filler neck from the side of the truck bed with the socket set. Unbolt the truck bed retainer bolts from the floor of the bed with the socket set.
Lift the bed up and off the Ranger's frame with the assistance of another person. Walk the truck bed off the back of the Ranger and set it off to the side.
Rap the rag around the tip of the screwdriver, place the tip against the fuel pump retaining ring and tap the screwdriver's handle with the rubber mallet to turn the retaining ring counterclockwise. Remove the ring by hand.
Disconnect the fuel pump wiring harness and fuel lines with the screwdriver. Lift the old pump out of the gas tank and insert the new pump in its place. Make sure the new pump occupies the same position and orientation the old pump had prior to removal.
Tighten the fuel pump retaining ring with the rag, screwdriver and mallet by rotating it clockwise. Reconnect the wiring harness and fuel lines with the screwdriver.
Lift the truck bed off the ground and place it back on the Ranger's frame with the assistance of another person. Make sure the fuel filler neck clears the frame and seats into the filler neck hole in the bed wall when you're lowering the bed onto the frame.
Reinstall the bed retaining bolts with the socket set and reconnect the negative battery cable to the battery with the battery wrench
I ran into the same problem and solved it. To replace the fuel pump I had to remove the bed since the fuel tank is under it. I had to disconnect the tail light wires including the ground wires. One side had 1 grounding wire and the other had 2 grounding wires. After a month of messing around with fuses and sensors I found out that one of the (Two ground wires) next to the left tail light was actually the (Fuel pump ground wire). So if you don't know which one I am talking about, make sure you connect ALL the tail light wires and plugs before cranking up the engine. This was my luck with the s10 2001 and good luck to you :)
This is not a full answer, but a tip on an easier way.to get to the pump. Instead of removing the gas tank. Just pull the bed off the truck! I guarantee that it will be easier. I did this on a 2001 S10 and it took less that an hour to remove the bed.
Remove the spare tire, and the tube that the tool to lower the tire goes through. You will need to unplug your tail lights under the back or the bed on both sides. There is also a grounding screw for the tail lights on each side that needs to be removed. Remove the screws that hold the gas tank filler hose to the side of the bed - right by the filler cap. Remove the tailgate (to make the bed lighter). Follow the frame down the length of the bed and you will find the bolts holding the bed on. There should be 6 or 8 bolts. My S10 had 8 bolts and my son's full size Chevy PU had 6 bolts (go figure?). Then just lift the bed off the truck. We did my S10 with 3 people and it had a camper shell and rack on it. My son's full size truck was lifted off with only 2 people. I would suggest 4 people however - one on each corner to make it easier to lift and control.
Replace the pump as described above and then you can start the engine to make sure everything works before setting the bed back on. NOTE: The fuel pump grounds back with the tail light ground. If the engine doesn't start right away, try grounding the wire back by the tail lights. It works like a charm. This is an especially nice way to do it if the gas tank is full! I spent 18 years as a professional mechanic and this is one of the slickest, least known tricks I have come across. I wish I'd known about it when I was wrenching for a living! Cheers!
No, As long as you have power and ground then you got a bad fuel pump, a relay is very uncommon for your truck. ALMOST all of the time the pump is bad. Make sure the Grey wire has power and the large black wire has ground. (the wires at the pump ontop of the fuel tank).
I find it easier to lift the bed of the truck off, then to remove the gas tank. The bed is only held on by 8 bolts and the fuel neck is held on by three 7mm headed bolts, There are also some wires you will need to remove for the rear tail lights.
make sure you get the right pump, you need to know your tank size. then take off your bed. you have i believe 6 bed bolts, disconnect tail lights (unplug from underneath) remove bed grounding strap 1 screw, remove bed with help. Disconnect wires, unscrew fuel pump, replace pump. Reverse order to replace bed. jim
No pressure at fuel rail or nothing coming from injectors? I have seen pumps fail like that though. Pump comes out like the older pickup/sending units did. after tank is down, remove snap ring then remove pump. Check the "sock" filter on the pump to make sure it's nopt plugged up...If it is, you can change sock and clean out tank. Otherwise replace pump.
No power to the fuel pump is a common issue with Toyota Trucks. More than likely, the power wire at the top of the fuel tank sending unit is rusted off. If this is the case, you either need to drop the tank, or remove the bed to replace the sending unit assembly. I have done it both ways, but have found that removing the bed is easier than dropping the tank.
Tested grey wire again but this time used the frame as my ground, had power now. Traced ground wire. My son did not put back on driver side rear bolt that it came off of. Wa La problem fixed. I have heard that sometimes this wire goes bad so if it is still connected you might have to splice in a new one.